Objectives: To evaluate the effectiveness and reliability of microinsert hysteroscopic sterilization method at short- and long-term. Materials and Methods: In the period between January 2004 and December 2005, 34 patients who submitted to the present gynecology outpatient clinic seeking for permanent contraception and accepted tubal sterilization with microinsert method were included in this prospective, interventional study. Results: Bilateral microinsert placement was successful in 28 (87.5%) of 32 patients that underwent the procedure. In all of the 30 patients (100%) in whom the placement procedure was attempted, bilateral tubal occlusion was documented by hysterosalpingogram (HSG) including the two patients in whom unilateral placement was carried out. First three procedures were performed under general anesthesia. Local or general anesthesia was not administered in any other cases (97.5%). The mean visual analogue scale score for pain felt during the procedure was 3.1. The mean procedure time was 11.5 +/- 4.88 (5-22) minutes, the average time from beginning the procedure to discharge of the patients was 41.7 +/- 18.5 (15-94) minutes. One intrauterine pregnancy was detected in one of the patients nine months after cessation of the alternative contraceptive period. This patient was excluded from the follow-up. At short-term all patients rated their microinsert-wearing tolerance as good or excellent At eighth year, three patients were lost to follow-up. Mean follow-up time was 83.4 +/- 15.0 (36-103) months. During 2,420 woman-months of follow-up, no other pregnancies were detected. Almost all of the patients were happy with the procedure and recommended it to a friend. Conclusion: Essure microinsert is a safe, effective, minimally invasive sterilization method which can be performed in outpatient settings without any anesthesia requirement. It appears to be a good alternative to laparoscopic tubal sterilization. The procedure time and the time to discharge are brief. Patient tolerance during the procedure and at long-term is very good.